A system, method and program for downloading radio software necessary for a user to a cellular phone or a radio terminal in advance so that the radio software is readily available. With the use of a service terminal, an in-service area management server, a radio software management server, a terminal management server, an accounting management server, a ticket information management server, an available service management server, a personal information management server, and an other provider management server, necessary radio software is downloaded from the radio software management server to a radio terminal or a cellular phone via a network according to location information and time information included in ticket information or personal information stored in the radio terminal or the cellular phone.